# TEM TE and TM Modes for Waveguides ?

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1. Feb 9, 2015

hello ;
I need some help.I reading about TEM TE and TM Modes for Waveguides. actually I need some equations for Planar wave guide and optical fiber wave guide. I did google search. I don't understand how to write equation step by step for planar wave guide
Your wave is unconstrained in the x direction, so you will get modes in y that will still use $\frac {m \pi}{a}$.